[modifier] Fix the orientation 2D noise case
[doc] Replace various call of time.sleep by pymorse.Morse.sleep

In this way, we can consider the simulated time, and not the "real" time
[examples] Replace various call of time.sleep by pymorse.Morse.sleep

In this way, we can consider the simulated time, and not the "real" time
[pymorse] Improve documentation about sleep and time method

Document them properly
Use them in the pymorse example
[doc] Add some entry in RELEASE_NOTES about Morse.{sleep, time}